Which paragraphs in this excerpt from the article "the melting arctic" from the european environmental agency rely on expert opinion to support the organization's point of view?

1 )greenland's ice sheet contains enough water to increase global sea levels by 7 meters. in any case, if it were to melt completely, it would take many centuries. recent melting of the greenland ice sheet is estimated to have contributed up to 0.7 millimeters a year to sea level rise (about one quarter of the total global average sea level rise of about 3.1 mm/year). projections for global average sea level rise estimates by 2100 vary from 0.2 to 2.0, depending on the model and scenario used.

2) "there is substantial uncertainty around by how much the sea levels may actually increase," said professor david vaughan from the british antarctic survey during his presentation. "once sea level rises, it is quite difficult to make it fall again. at the moment, the sea level is increasing by about 3 mm per year, but with climate change, this rate is very likely to increase."

3) vaughan continued, "there are different factors behind sea level rise. about one third of the rise we can expect could be linked to the thermal expansion of oceans. melting mountain glaciers are also predictable and their contribution can be estimated roughly. the big uncertainty is linked to ice sheets in greenland and the antarctica. we have studies on how they are losing ice, but projections come with high levels of uncertainty."

4) warmer temperatures in the arctic accelerate the melting, which result in darker surfaces on the sea and land. these darker surfaces retain a larger part of the solar energy instead of reflecting it back. warmer air and water temperatures in the region also affect the surrounding land, including the permafrost, which has started melting both on land and at sub-sea level. .

5) in addition to potentially causing sea levels to rise and contributing to global warming, the arctic melting could also alter the oceans' salinity levels and affect ocean currents. moreover, increased absorption of co2 in the oceans can lead to ocean acidification and this can in turn alter the composition and distribution of key arctic species like crustaceans, krill and plankton.

6) according to morten olsen, chair of a recent arctic council assessment on changes in arctic snow- and ice-conditions, "changes in the climate and cryosphere risk fundamentally altering the arctic ecosystems. warmer water temperatures might result in invasive species moving north, which would affect local species and ultimately local economies."

this essay is about basketball hope you like it, also dont forget to give me a good rating

  a basketball team comprises of five players as mentioned above. the five players include point guard, shooting guard, small forward, power forward and center (ramen 56). the rules do not limit players to certain locations. however, evolution of basketball from the 1980s made players assume certain locations and roles. the point guard should be the fastest team member, and is responsible for organizing the attacks of the team. he does this by making sure that the right player has the ball at the right time (wissel 87). the shooting guard creates mainly long-range shorts and watches the opponent's last player on the defense. the small forward member of the team is majorly responsible for scoring points through dribble penetration and cuts to the basket. he also rebounds and plays actively. power forward plays invasively having their back to the basket and when on defense he plays under the basket or against the opponent's power forward (ramen 54). the center often uses his size and height to score and safeguard the basket when on defense. however, there is no rule that limits the players to these descriptions.  

              there are four quarters in regular basketball game, and each takes 10 or 12 minutes (ramen 67). in college basketball games, the game uses two-twenty minute halves. extra time should take 5 minutes in all games except in high school, where it takes four minutes. teams need to change sides after the first half of the game. a typical basketball game might take approximately 2 hours excluding the time when the game is inactive. at any given time, the court should have ten players, 5 from both sides. despite substitutions being unrestricted, it can only be performed when the game is stopped (wissel 51). additionally, teams must have a uniform comprising of a jersey and a pair of shorts. for identification purposes, the jersey should have a unique number in the team printed at the front and back. in some instances, the jerseys have the names of players, sponsors and team printed on them.  

              in conclusion, regulation basketball hoop comprises of a rim or basket attached to a backboard. violating the rules of the game results in a change of the shot clock if the committed by the defense or loss of ball possession. basketball teams comprise of five players, which includes the point guard, shooting guard, power forward, small forward and center. a typical basketball game might take approximately 2 hours excluding the time when the game is inactive.